Kernel: Share __assertion_failed() implementation between architectures

I put the generic implementation in Assertions.cpp, since the
declaration is in Assertions.h.

The only change needed to make the x86-64 implementation generic was
replacing the cli with a Processor::disable_interrupts().

Kernel/Arch/aarch64/Panic.cpp

@@ -1,24 +0,0 @@
-/*
- * Copyright (c) 2022, Timon Kruiper <timonkruiper@gmail.com>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#include <Kernel/Arch/Processor.h>
-#include <Kernel/KSyms.h>
-#include <Kernel/Library/Panic.h>
-
-// FIXME: Merge the code in this file with Kernel/Library/Panic.cpp once the proper abstractions are in place.
-
-// Note: This is required here, since __assertion_failed should be out of the Kernel namespace,
-//       but the PANIC macro uses functions that require the Kernel namespace.
-using namespace Kernel;
-
-[[noreturn]] void __assertion_failed(char const* msg, char const* file, unsigned line, char const* func)
-{
-    critical_dmesgln("ASSERTION FAILED: {}", msg);
-    critical_dmesgln("{}:{} in {}", file, line, func);
-
-    // Used for printing a nice backtrace!
-    PANIC("Aborted");
-}

Kernel/Arch/riscv64/Panic.cpp

@@ -1,24 +0,0 @@
-/*
- * Copyright (c) 2022, Timon Kruiper <timonkruiper@gmail.com>
- *
- * SPDX-License-Identifier: BSD-2-Clause
- */
-
-#include <Kernel/Arch/Processor.h>
-#include <Kernel/KSyms.h>
-#include <Kernel/Library/Panic.h>
-
-// FIXME: Merge the code in this file with Kernel/Library/Panic.cpp once the proper abstractions are in place.
-
-// Note: This is required here, since __assertion_failed should be out of the Kernel namespace,
-//       but the PANIC macro uses functions that require the Kernel namespace.
-using namespace Kernel;
-
-[[noreturn]] void __assertion_failed(char const* msg, char const* file, unsigned line, char const* func)
-{
-    critical_dmesgln("ASSERTION FAILED: {}", msg);
-    critical_dmesgln("{}:{} in {}", file, line, func);
-
-    // Used for printing a nice backtrace!
-    PANIC("Aborted");
-}

Kernel/CMakeLists.txt

@@ -261,6 +261,7 @@ set(KERNEL_SOURCES
     Memory/VirtualRange.cpp
     Locking/LockRank.cpp
     Locking/Mutex.cpp
+    Library/Assertions.cpp
     Library/DoubleBuffer.cpp
     Library/IOWindow.cpp
     Library/MiniStdLib.cpp
@@ -448,7 +449,6 @@ if ("${SERENITY_ARCH}" STREQUAL "x86_64")
         ${KERNEL_SOURCES}
         
         ${CMAKE_CURRENT_SOURCE_DIR}/Arch/x86_64/ASM_wrapper.cpp
-        ${CMAKE_CURRENT_SOURCE_DIR}/Arch/x86_64/CPU.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/Arch/x86_64/CPUID.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/Arch/x86_64/InterruptManagement.cpp
         ${CMAKE_CURRENT_SOURCE_DIR}/Arch/x86_64/Interrupts.cpp
@@ -501,7 +501,6 @@ elseif("${SERENITY_ARCH}" STREQUAL "aarch64")
         Arch/aarch64/kprintf.cpp
         Arch/aarch64/MainIdRegister.cpp
         Arch/aarch64/PageDirectory.cpp
-        Arch/aarch64/Panic.cpp
         Arch/aarch64/Processor.cpp
         Arch/aarch64/PowerState.cpp
         Arch/aarch64/SafeMem.cpp
@@ -545,7 +544,6 @@ elseif("${SERENITY_ARCH}" STREQUAL "riscv64")
         Arch/riscv64/Interrupts/PLIC.cpp
         Arch/riscv64/MMU.cpp
         Arch/riscv64/PageDirectory.cpp
-        Arch/riscv64/Panic.cpp
         Arch/riscv64/PCI/Initializer.cpp
         Arch/riscv64/PowerState.cpp
         Arch/riscv64/pre_init.cpp

Kernel/Library/Assertions.cpp

@@ -4,17 +4,19 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#include <AK/Assertions.h>
-#include <AK/Platform.h>
-#include <Kernel/Arch/CPU.h>
+#include <Kernel/Arch/Processor.h>
+#include <Kernel/Library/Assertions.h>
 #include <Kernel/Library/Panic.h>
 #include <Kernel/Tasks/Process.h>
+#include <Kernel/Tasks/Thread.h>
 
+// Note: This is required here, since __assertion_failed should be out of the Kernel namespace,
+//       but the PANIC macro uses functions that require the Kernel namespace.
 using namespace Kernel;
 
 NO_SANITIZE_COVERAGE void __assertion_failed(char const* msg, char const* file, unsigned line, char const* func)
 {
-    asm volatile("cli");
+    Processor::disable_interrupts();
     critical_dmesgln("ASSERTION FAILED: {}", msg);
     critical_dmesgln("{}:{} in {}", file, line, func);